TRY THIS NEXT TIME YOU'RE WITH YOUR HORSE:
Hold your horses halter with a hand on each side of their cheeks.
If safe to do so, stand in front and with gentle vibrations downward, or slightly side to side on the noseband, ask them to lower their head so you can see their mane.
It is a suggestion. You can not force is, or you will create tension.
Keep your hands in contact as they may lift their head or flick at a fly and bump you in the face.
Once you can see the top of the mane, suggest with little vibrations to one side, that they barely turn their nose that way. A flexion has less than 1" (2.5cm) of movement. If you don't see a change, you may already have it. Then try the other direction.
Can you move your horse's nose either side of center, while the ears stay level?
If if doesn't move equally well both ways, they are bracing. If they seem to but the ears are not level, they are avoiding the flexion by ducking under it.
We will also work on this, in the online clinic.
It is a little thing, that you absolutely Must Have.